Fuel-atomizing nozzle



March 17, 1931.

R. R. WATERMAN 1,797,110

FUEL ATOMIZING NOZZLE Filed Jh'ne' 15, 1926 INVENTOR. Russell R.Waiermau A TTORNEY Patented Mar. 17, 1931 a UNITED STATES PATENT OFFICERUSSELL R. WATERMAN, OF LONG BEACH, CALIFORNIA, ASSIGNOR TO FARMERSNATIONAL BANK OF GREENVILLE, OF OHIO, TRUSTEE FUEL-ATOMIZING- NOZZLEApplication filed June 15,

My invention relates to fuel atomizing nozzles and the principal objectsof my invention are; first, to provide an atomizing nozzle which'has acompound atomizing action; second, to provide an atomizing nozzle whichis new and novel in its construction; and, third, to provide anatomizing nozzle which is Very simple and economical of construc tion,easy to install, eflicient in its action and which will not readilydeteriorate or get out of order.

With these and other objects in view, as will appear hereinafter, myinvention con sists of certain novel features of construction,combination and arrangement of parts and portions as will be hereinafterdescribed in detail and particularly set forth in the appended claims,reference being had to the accompanying drawings and to the charactersof reference thereon which form a part of this application in which:

Figure 1 is a sectional view through the atomizing nozzle and shown inconnection with a fragmentary portion of a vaporizer, and Fig. 2 is asectional view through line 22 of Fig. 1.

Similar characters of reference refer to similar parts and portionsthroughout the diiferent views of the drawings.

The fuel discharge tube 1, ejector tube 2, and the air nozzle 3constitute the principal parts and portions of the atomizing nozzle.

The air nozzle 3 is a hollow cylinder, the central bore 3a of which iscurved and tapered from near the middle of its length to the bottom endthereof and toward the axis. The exterior of the air nozzle is threadedfor about one-half of its length, the remainder of the periphery beingof a slightly larger diameter than the threaded portion, thus forming ashoulder 37) which engages a ledge 4a of a boss 4 which is formed on thevaporizer to support the complete atomizer nozzle.

The ejector tube 2 has a broad flange 2a extending radially from the oneend thereof. The flange 2a is secured upon the upper end of the boss 4,permitting the ejector tube 2 to extend into the bore 3a of the airnozzle 3 and having an air chamber 5 between the boss 4 and the ejectortube 2. The outside 1926. Serial N0.'116,104.

diameter of the ejector tube 2 at its upper end is enlarged but issmaller than'the diameter of the bore 3a of the air nozzle 3 and as itenters the air nozzle this diameter is reduced, thus forming an inwardlyinclined channel for air when the parts are assembled, the ejector tube2 extending into the air nozzle 3 for about three-quarters the length ofthe air nozzle. A plurality of small apertures 26 are provided throughthe walls of the ejector tube 2 directly beneath the flange 2a.

The fuel discharge tube 1 is closed at its upper end and is providedwith a broad flange 1a which extends radially from the walls atsubstantially the middle portion intermediate the ends thereof. Theflange 1a is se cured upon the flangeQa, the open end of the fueldischarge tube 1 extending into and for about two-thirds the length ofthe ejector tube 2. The interior portion of the fuel discharge tube 1 isreduced in diameter where it extends into the reduced diameter portionof the ejector tube 2. A boss 15 is provided on one side of the fueldischarge tube 1 near the closed end thereof and above the flange 1a.The boss 1?) is provided with an aperture 10 which opens into thecentral orifice of the fuel discharge tube 1. The outer end of theaperture 10 is tapped to receive the. end of the conventional fuel line6 from which fuel is supplied under little or no pressure.

. An air intake pipe 7 provided on the one side of the boss 4 opens intothe air chamber 5. A smallaperture 8 is provided in the wall of the fueldischarge tube 1, beginning at the central orifice of the fuel dischargetube 1 near the closed end thereof and opposite the aperture 10, whichaperture extends down and out so as to open into the top of the airpassage surrounding the fuel discharge tube 1. A small aperture 9 isprovided at the one side of the boss 4 providing a passage or drain fromthe air intake pipe 7 to the vaporizer for any moisture caused bycondensation in the air as it passes toward and into the atomizer. Theair then passes from the air intake pipe 7 into the air chamber 5 wherethe greater portion of it is forced around the ejector tube 2 and outthrough the bore 8a of the air nozzle 8, atomizing and mixing the OHIO,OF GrREENVILLE, OHIO, A CORPORATION T particles of air and fuel whichhave been forced from the jector tube 2. This forcing of the airand fuelfrom the ejector tube 2 is caused by passage of a small portion of theair from the air chamber 5 through the aperture 2?) into the ejectortube 2, this air mixing with the fuel that is flowing from the fueldischarge tube 1. Fuel is conducted into the fuel discharge tube 1 bymeans of the fuel line 6. A very small portion of the air passing aroundthe ejector tub Q is conducted by means of the aperture 8 into thecentral orifice of the tube 1 overcoming any great vacuum therein andpermitting the escape of the fuel therefrom.

Though I have shown and described a particular construction, combinationand a1- rang-ement of parts and portions, I do not 'ish to be limited tothis particular construction, combination and arrangement but desire toinclude in the scope of my invention the construction, combination andarrange ment substantially as set forth in the ap pended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In a fuel atomizer, an oil discharge tube closed at one end, an oilsupply tube communicating with the closed end thereof and positioned atright angles thereto, a tubular ejector member surrounding said oildischarge tube, forming therewith a closed outer end of theinjectormember and spaced from the inner end thereof and provided with aplurality of air inlets near its closed end and backwardly from thedischarge end of the oil discharge tube and an air channel around thesame for supplying said inlets, and a air nozzle surrounding theextended end of said ejector member and spaced therefrom and suppliedfrom said channel.

2. In a fuel atomizer, an oil discharge tube, closed at one end, an oilsupply tube com -l municating with the closed end thereof and positionedat right angles thereto, a tubular ejector member surrounding said oildischarge tube, forming therewith a closed outer end of the injectormember'and spaced from the inn-erend thereof and provided with aplurality of air inlets near its closed end and backwardly from thedischarge end of the oil discharge tube and an air'channel around thesame for supplying said inlets, an air nozzle surrounding the extended.end of said ejector member and spaced therefrom and supplied from saidchannel, and air inlet means communicating with the interior of saidejector member and with the interior of said air nozzle.

3. In a fuel atomizer, an ejector nozzle provided in its side walls nearone end with a plurality of air inlet orifices, a fuel oil dischargenozzle extending into said end of the ejector nozzle, fitting tightlytherein,

substantially aligned therewith and extending beyond the orifices andspaced with its end inwardly from the discharge end of the ejectornozzle, an air nozzle surrounding the ejector nozzle and extendingbeyond the inner discharge end thereof, and an air supply conductorcommunicating directly with the interior of the air nozzle and directlywith said orifices.

4. In a fuel atomizer, an ejector nozzle provided in its side walls nearone end with a plurality of orifices, a fuel oil discharge nozzleextending into said end of the ejector nozzle, fitting tightly therein,substantially aligned therewith and extending beyond the orifices andinwardly from the opposite end thereof, an air nozzle surrounding theejector nozzle and extending beyond the inner discharge end thereof, andan air supply conductor communicating with the interiorof the air nozzleand with said orifices, the inner end of the space between the airnozzle and the ejector nozzle communicating through the side with theinner end of the fuel discharge nozzle.

5. In a fuel atomizer of the class described, afuel oil dischargenozzle, an ejector nozzle surrounding said fuel oil discharge nozzle, anair nozzle surrounding the ejector nozzle and extending beyond thedischarge end of the latter, and an air supply means communicating withthe inner end of said air nozzle and the inner end of said ejectornozzle, said fuel oil discharge nozzle having a small air passagecommunicating with said air supply means from the inner end of the fueloil discharge nozzle.

In testimony whereof, I have hereunto set my hand at Los Angeles,California, this 8th day of June, 1926.

RUSSELL R. WATER-MAN.

